MORTAR 1 Flashcards

1
Q

What is Mortar?

A

Mortar is a paste made by mixing water with a binding material (cement or lime) and fine

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2
Q

What factors determine the durability, quality, and strength of mortar?

A

The durability, quality and strength of mortar will mainly depends on quantity and quality of the matrix.

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3
Q

What is the primary function of mortar?

A

Mortar firmly binds bricks or stones together.

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4
Q

: What are the alternate terms for the components of mortar?

A

The binding material is referred to as the Matrix, and the fine aggregates are referred to as the Adulterant.

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5
Q

What do sand particles consist of?

A

Sand particles consist of small grains of silica (SiO2)

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6
Q

What is Pit Sand?

A

Pit sand is found as deposits in soil and obtained by forming pits to a depth of about 1 m to 2 m from ground level.

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7
Q

What are the characteristics of Pit Sand?

A

Pit sand has sharp angular grains, which are free from salts. It is an excellent material for mortar and concrete work

High bonding strength

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8
Q

What should be used for making mortar?

A

pit sand

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9
Q

Where is River Sand obtained from?

A

River sand is obtained from the banks or beds of rivers.

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10
Q

What is the texture of River Sand?

A

River sand has fine, rounded grains.

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11
Q

What is the color of River Sand?

A

white

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12
Q

Why is River Sand widely used?

A

River sand is usually available in clean condition

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12
Q

Where is Sea Sand obtained from?

A

Sea sand is obtained from seashores.

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12
Q

What is the texture of Sea Sand?

A

Sea sand has fine, rounded grains.

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13
Q

What is the color of Sea Sand?

A

The color of sea sand is light brown.

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14
Q

Why is Sea Sand not recommended for engineering works?

A

Sea sand consists of salts that attract moisture from the atmosphere, causing dampness, efflorescence, and disintegration of work.

15
Q

: What is Fine Sand?

A

Fine sand passes through a screen with a clear opening of 1.5875 mm and is mainly used for plastering work.

16
Q

What is Coarse Sand?

A

Coarse sand passes through a screen with a clear opening of 3.175 mm and is generally used for masonry work.

17
Q

What is Gravelly Sand?

A

Gravelly sand passes through a screen with a clear opening of 7.62 mm and is generally used for concrete work.